Which famous consumer brand gained worldwide recognition during WWII for its special military version that became a symbol of Allied forces?

Throughout military history, many companies have achieved fame and fortune through contracts with armed forces, creating iconic products that became synonymous with warfare. Some brands became so closely associated with military operations that they've entered the cultural lexicon. This trivia explores a fascinating intersection between military history and brand development - where commercial products became inseparable from the conflicts in which they served.

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Coca-Cola, which built 64 bottling plants near combat zones and supplied over 5 billion bottles to troops at a nickel each regardless of location
Hershey's, which created the D-ration chocolate bar that could withstand high temperatures but was deliberately made to taste unpleasant to prevent soldiers from eating it except in emergencies
Gillette, which provided specialized waterproof razors to submarine crews and paratroopers that became standard issue across all military branches
Zippo, which guaranteed its windproof lighters would 'Work or we fix it free' even in combat conditions, leading to millions of sales to servicemen